package com.abner.juc.util;

import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;

/**
 * 开会
 *   只有7个人全到才能开会
 */
public class CyclicBarrierDemo {
    public static void main(String[] args) {
        CyclicBarrier cyclicBarrier = new CyclicBarrier(7, () -> System.out.println("开始开会----"));
        for (int i = 0; i < 7; i++) {
            new Thread( () -> {
                System.out.println(Thread.currentThread().getName());
                try {
                    cyclicBarrier.await();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } catch (BrokenBarrierException e) {
                    e.printStackTrace();
                }
            },String.valueOf(i)).start();
        }
    }
}
